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fortran-compiler/datast.bli
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!COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1972, 1985
!ALL RIGHTS RESERVED.
!
!THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
!ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
!INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
!COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
!OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
!TRANSFERRED.
!
!THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
!AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
!CORPORATION.
!
!DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
!SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
!AUTHOR: S. MURPHY/DCE/TFV/CKS/AHM/RVM/CDM/PLB
MODULE DATAST(RESERVE(0,1,2,3),SREG=#17,VREG=#15,FREG=#16,DREGS=4)=
BEGIN
GLOBAL BIND DATASV = #10^24 + 0^18 + #2457; ! Version Date: 20-Sep-84
%(
MODULE: DATAST
This module performs allocation for DATA statements. The
objective of DATA statements is to give the loader information
about storage areas in a Fortran program which are to be
preinitialized before execution of the program. The loader
must be told each location to be initialized and the
corresponding constant to be stored there.
A DATA statement has associated with it 2 kinds of lists:
1. Data item lists- these describe locations into
which the constants are to be initialized. A
data item list looks like an IOLIST. Elements
on a data-item list may be:
A. DO statement
B. CONTINUE statement with a label that
terminates the DO
C. DATACALL: which may have as an arg either
a scalar or an ARRAYREF. If arg is an
ARRAYREF then all subscripts must be of
the form C1*I+C2 where I is a loop index
and C1 and C2 are INTEGER constants.
D. SLIST call
2. Data constant lists- these indicate the initial values
to be stored. A data constant list is a linked list of
elements of the form:
---------------------------------
[2202] ! DCONST ! CLINK !
---------------------------------
[2202] ! DATARPT !
---------------------------------
where CLINK points to the next element on the list
(or is 0 for the last element), DCONST points to a
constant table entry (may be for a literal or for
any other constant) and DATARPT is a count of the
number of times the constant indicated is to be stored.
)%
%(
***** Begin Revision History *****
38 ----- ----- COMMENT OUT CALLS TO "ZDMPBLK" IN "DATPROC"
39 ----- ----- FIX ERROR CALLS
40 ----- ----- GIVE WARNING WHEN THERE ARE FEWER VARS THAN CONSTS
IN A GIVEN DATA STMNT; MAKE THE WARNING WHEN THERE
ARE TOO FEW CONSTS COME OUT ONLY ONCE;
REMOVE THE CALLS TO ZDMPBLK IN "DATPROC" WHICH WERE
PREVIOUSLY COMMENTED OUT
41 ----- ----- GIVE AN ERROR MESSAGE WHEN ATTEMPT TO WRITE BEYOND
THE END OF AN ARRAY IN A DATA STATEMENT
42 ----- ----- SHOULD USE "EXTSIGN" WHEN PICKING UP TARGADDR
FIELD FOR AN ARRAY REF
43 16361 273 SHOULD USE "EXTSIGN" WHEN PICKING UP CONSTANT IN
CNSTEVAL, (JNT)
44 314 QAR SHOULD USE "EXTSIGN" FOR IMPLIED DO LOOPS IN DATA, (JNT)
***** Begin Version 5B *****
45 666 25572 NEGATIVE INCREMENT IN DATA STATEMENT NOT
HANDLED CORRECTLY - DATA (A(I),I=10,1,-1), (DCE)
***** Begin Version 6 *****
46 761 TFV 1-Mar-80 -----
Add KTYPCG to fold /GFLOATING type conversions
52 1131 AHM 22-Sep-81 Q20-01671
Check for storing before the first word of an array in GETDADDR
since we already check for storing after the last word.
***** Begin Version 6A *****
1157 EGM 11-Jun-82
Alter error FTNMVC to indicate whether there are more or less data
items that constants in a DATA statement.
***** Begin Version 7 *****
47 1212 TFV 29-Apr-81 ------
Replace LITERAL with HOLLERITH, LITERALENTRY with HOLLENTRY.
50 1236 SRM 15-July-81 ------
Allow CHARACTER constants as well as HOLLERITH constants
to be used to initialize numeric data
51 1242 CKS 29-Jul-81
Add initialization of CHARACTER variables.
53 1416 CKS 9-Nov-81
Add initialization of character substrings. Allow integer
exponentiation in subscripts and substring bounds. Detect
zero-trip DO loops if F77.
54 1430 CKS 3-Dec-81
Add code to check substring bounds in when substrings occur in
DATA statements
55 1461 CKS 20-Jan-82
Change an error message: "DATA statement exceeds bounds of array"
to "Illegal substring bound in DATA statement". Also add identifier
name to "Can't store numeric constant in character variable."
1542 RVM 25-May-82
Always convert the REAL (GFLOATING) constants back to single
precision, even if the REAL constant was created by a conversion
from an OCTAL (or LOGICAL or HOLLERITH ...) constant originally.
***** Begin Version 10 *****
2202 CDM 7-Apr-83
Remove calls to EXTSIGN for IDDATVAL fields. This is now a full
word, so it does not need to have the sign extended.
2216 PLB 27-Sep-83
Add a dot to the BP in each call to BPADD; it used to be a MACRO
now it is a routine in OUTMOD.
2423 AHM 13-Jul-84
Add support for 1160 Ultimate Sparse Data REL blocks under
/EXTEND. Add a new routine named FLUSHDATA which buffers and
outputs 1160 blocks and call it from OUTDATA and OUTCHDATA.
Move those routines from OUTMOD and RELBUF so that they can
share module OWNs along with FLUSHBUFFER. Make DATAST's
module preface conform to the new conventions.
2432 AHM 23-Jul-84
Create an alias named RULTFLAGS for the concatenation of the
1160 flag bits RULTRPTFLAG, RULTFILLFLAG and RULTBYTEFLAG, and
clear it near the top of FLUSHDATA. Cures bad REL files
caused by assuming that the garbage left on the top of the
stack was zero.
2435 AHM 24-Jul-84
Invalidate DATNEXT at the start of each program unit's DATA
statement processing by setting it to -1. This insures that
OUTDATA and OUTCHDATA will not append DATA statements in
different program units to the same 1160 block.
2452 AHM 20-Aug-84
Make OUTCHDATA return immediately when handed a NIL pointer
for a CHARACTER constant, as GETCHCNST intends it to. This
prevents it from generating bad REL blocks based on the
contents of the compiler's ACs.
2453 AHM 22-Aug-84
Fix the 1160 box to reflect RULTSYMLEN getting narrower.
Also, change lengthy disjunctions in OUTDATA and OUTCHDATA
into IF/THEN/ELSE's for speed. Finally, insert a missing dot
and reverse the sense of a test in OUTDATA at the same time.
2457 AHM 20-Sep-84
Changes to Ultimate Sparse Data Support for code review.
Comment changes, except for changing access to DCON1 and DCON2
in OUTDATA from formals to globals.
***** End V10 Development *****
***** End Revision History *****
)%
!Require: FIRST.BLI
!Require: TABLES.BLI
!Require: REQREL.BLI
SWITCHES NOLIST;
REQUIRE 'FIRST.BLI';
REQUIRE 'TABLES.BLI';
REQUIRE 'REQREL.BLI';
SWITCHES LIST;
FORWARD
DATPROC, ! Walk all DATA statements and allocate them
ALCDATA, ! Allocate a single DATA statement
ADJDATPTR, ! Handle list of IOLSCLS, DO and CONTINUE nodes
GETDADDR, ! Get address of next numeric variable
GETCHADDR, ! Get byte pointer for next CHARACTER variable
CNSTEVAL, ! Exaluate INTEGER CTCE for ARRAYREFs
IPOWER, ! Calculate INTEGER**INTEGER
GETDCNST, ! Get next numeric constant
GETCHCNST, ! Get next CHARACTER constant
%2423% OUTDATA, ! Output numeric data to REL file
%2423% OUTCHDATA, ![1242] Output CHARACTER data to REL file
%2423% FLUSHDATA; ! Flush buffered 1160 blocks to REL file
EXTERNAL
%2423% &JBDA, ! The value of this symbol is the first location
! available to the user. Used to distinguish psect
! indices from addresses in the compiler lowseg.
%2216% BPADD, ! ADJBP-er; Was a MACRO until now
C1H, ! High order
C1L, ! and low order arguments
C2H, ! for the
C2L, ! constant combination module
CGERR, ! ICEs the compiler
CNSTCMB, ! Combines arguments of CTCE's
COPRIX, ! Operator index arguments for CMSTCMB
BASE CSTMNT, ! Pointer to current statement
DATASPTR, ! LH contains a pointer to the first DATA statement
DMPMAINRLBF, ! Output the contents of the main rel buffer
DMPRLBLOCK, ! Outputs a block of rel code to the rel file
E135, ! "DATA statement exceeds bounds of array X"
E160, ! "Can't store numeric constant
! in character variable X"
E161, ! "Character constant split between numeric
! and character variables"
E173, ! "Illegal substring bound in DATA statement"
E175, ! "Zero-trip DO loop illegal in DATA statement"
E57, ! "Number of variables is greater/less than the number
! of constants in DATA statement"
%2342% EXTERNPSECT, ! Table of external psect indices
! indexed by internal psect indices
FATLERR, ! Prints fatal messages
ISN, ! Used to communicate current statement's ISN
KISNGL, ! Rounds a REAL that is being represented
! internally with 2 words of precision
KTYPCB, ! Base in table for constant folding
! for type conversions
%761% KTYPCG, ! To fold /GFLOATING type conversions
RELBUFF MAINRLBF, ! Main rel file buffer - used for type 1 and 1010
! (code and data) as well as miscellaneous
! (hiseg, end, etc.)
RADIX50, ! Return Radix-50 of the sixbit word in R2
RDATWD, ! Holds the data word for ZOUTBLOCK
WARNERR, ! Prints warning messages
ZOUTBLOCK; ! Buffers a word to the rel file
OWN
CHDBP, CHDLEN, !CHAR BYTE POINTER AND CHAR STRING LENGTH TO BE
! INITIALIZED
CNSTCT, !NUMBER OF TIMES THAT THE CONSTANT INDICATED BY
! "DATACNSTPTR" HAS BEEN OUTPUT SO FAR (NOTE THAT FOR
! A MULTI-WORD CONSTANT, THIS COUNT IS ONLY INCREMENTED
! AFTER ALL WORDS OF THE CONSTANT HAVE BEEN OUTPUT)
CNSTWDCT, !NUMBER OF WORDS OF THE INDICATED CONSTANT THAT HAVE
! BEEN OUTPUTED SO FAR (NOTE THAT WHEN THE SAME
! CONSTANT IS OUTPUT MORE THAN ONCE, THIS COUNT IS SET
! BACK TO 0 EACH TIME WE GO BACK TO THE FIRST WORD OF
! THE CONSTANT)
BASE DATACNSTPTR, !POINTS TO THE ELEMENT ON THE DATA CONSTANT LIST
! WHICH IS CURRENTLY BEING USED
%2423% DATDAT[2], !Pointer to buffered literal table entry, or 1 or 2
! buffered words of numeric data for 1160 support
%2423% DATFILL, !Fill count for buffered 1160 data item
%2423% DATNEXT, !Byte pointer or address for next 1160 datum to
! qualify as a repeat of the buffer contents
%2423% BASE DATORG, !Origin byte pointer for start of buffered 1160 data
%2423% BASE DATPSECT, !Psect index or pointer to COMMON block
! for DATORG and DATNEXT
%2423% DATRPT, !Current repeat count of buffered 1160 data
%2423% DATSIZE, !Byte or word count for 1160 data
BASE DATAITMPTR, !POINTS TO THE ELEMENT IN THE DATA-ITEM LIST WHICH
! IS CURRENTLY BEING FILLED IN
DCON1, DCON2, !CONSTANT WDS TO BE OUTPUT NEXT; IF THE SYMBOL
! BEING INITIALIZED IS DOUBLE PREC OR COMPLEX
! DCON1 IS HIGH ORDER PART, DCON2 LOW ORDER PART;
! OTHERWISE (FOR INTEGER AND REAL) DCON2 IS NOT USED
XTRAVARS; !FLAG INDICATING THAT WE HAVE
! TOO FEW CONSTANTS IN THE STMNT BEING PROCESSED
GLOBAL ROUTINE DATPROC =
%(***************************************************************************
ROUTINE TO WALK THRU ALL DATA STATEMENTS PERFORMING ALLOCATION FOR THEM
THE GLOBAL "DATASPTR" CONTAINS A PTR TO THE FIRST DATA STMNT IN ITS LEFT HALF.
***************************************************************************)%
BEGIN
%1242% DMPMAINRLBF(); ! DUMP PREVIOUS .REL BLOCK FROM MAIN BUFFER.
! SINCE OUTCHDATA WRITES TYPE 1004 BLOCKS
! DIRECTLY, IT WON'T CAUSE BUFFER TO GET DUMPED
! SO DO IT NOW TO GET THINGS IN THE RIGHT ORDER
CSTMNT = .DATASPTR<LEFT>;
%2423% DATRPT = 0; ! Make the buffer empty
%2435% DATNEXT = -1; ! Make sure that no one appends to the
! buffer. Set it to a value which is
! not a valid byte pointer or address
UNTIL .CSTMNT EQL 0
DO
BEGIN
ISN = .CSTMNT[SRCISN];
ALCDATA();
CSTMNT = .CSTMNT[CLINK];
END;
%2423% IF EXTENDED AND .FLGREG<OBJECT> ! Generating 1160 blocks?
%2423% THEN FLUSHDATA(); ! Yes, flush the buffer
END; ! of DATPROC
GLOBAL ROUTINE ALCDATA=
%(***************************************************************************
ROUTINE TO PERFORM ALLOCATION FOR DATA STATEMENTS.
CALLED WITH CSTMNT POINTING TO A STATEMENT OF THE FORM:
----------------------------------------
! DATITEMS ! CLINK !
------------------------------------------
! DATCOUNT ! OPERATOR !
-----------------------------------------
! ISN ! DATCONS !
------------------------------------------
WHERE:
DATCONS - POINTS TO A DATA-CONSTANT-LIST
DATITEMS - POINTS TO A DATA-ITEM-LIST
***************************************************************************)%
BEGIN
OWN BASE SYM; !PTR TO THE SYMBOL TABLE ENTRY FOR THE VAR BEING INITIALIZED
OWN DADDR; !ADDRESS TO BE INITIALIZED (ADDRESS OF 1ST WD
! IF THE VAR IS DOUBLE-PREC)
DATAITMPTR_.CSTMNT[DATITEMS];
ADJDATPTR(); !GET PTR TO THE FIRST ELEMENT ON THE
! DATA ITEM LIST WHICH IS EITHER AN SLIST
! OR A DATACALL (AND SET UP VALS OF INDICES
! FOR IMPLICIT DO STMNT)
DATACNSTPTR_.CSTMNT[DATCONS]; !1ST ENTRY ON DATA CONSTANT LIST
CNSTCT_0; !NUMBER OF TIMES THIS CONSTANT HAS BEEN
! OUTPUT SO FAR
CNSTWDCT_0; !NUMBER OF WORDS OF THIS CONSTANT THAT
! HAVE BEEN OUTPUT SO FAR
XTRAVARS_FALSE; !FLAG INDICATING THAT HAVE RUN OUT OF CONSTS BEFORE
! FILLING ALL VARS(USED TO PREVENT REPEATING ERROR MESSAGE)
%(***WALK THRU THE DATA ITEM LIST OUTPUTING A CONSTANT FOR EACH LOCATION***)%
UNTIL .DATAITMPTR EQL 0
DO
BEGIN
%(***IF THIS DATA-ITEM IS AN SLIST (IE WANT TO FILL A WHOLE ARRAY)***)%
IF .DATAITMPTR[OPR1] EQL SLISTCLFL
THEN
BEGIN ! SLIST
OWN BASE SLSTCT; !PTR TO CONSTANT TABLE ENTRY FOR NUMBER
! OF ITEMS IN THE ARRAY
OWN WORDCT; !NUMBER OF WORDS IN THE ARRAY
SYM_.DATAITMPTR[SCALLELEM]; !PTR TO SYMBOL TABLE ENTRY FOR THE ARRAY
SLSTCT_.DATAITMPTR[SCALLCT];
IF .SYM[VALTYPE] NEQ CHARACTER
THEN
BEGIN ! NON-CHARACTER
%(***GET THE NUMBER OF WORDS IN THE ARRAY (THE SCALLCT FIELD
PTS TO ENTRY FOR THE NUMBER OF ITEMS. FOR DOUBLE-WD ENTRIES
MUST MULTIPLY BY 2)***)%
WORDCT_(IF .SYM[DBLFLG] THEN .SLSTCT[CONST2]*2 ELSE .SLSTCT[CONST2]);
%(***OUTPUT A CONSTANT TO BE STORED INTO EACH ELEM OF THE ARRAY***)%
INCR I FROM 0 TO .WORDCT-1
DO
BEGIN
! Determine what constant to output
! and put it in DCON1 and DCON2
GETDCNST(.SYM);
! Now output the constant that is
! living in DCON1 and DCON2
%2457% OUTDATA(.I+.SYM[IDADDR],.SYM);
! If this is a DP or COMPLEX array,
! must increment address again
IF .SYM[DBLFLG]
%2423% THEN I = .I+1;
END;
END ! NON-CHARACTER
ELSE
BEGIN ! [1242] CHARACTER
CHDBP = .SYM[IDCHBP];
CHDLEN = .SYM[IDCHLEN];
DECR I FROM .SLSTCT[CONST2] TO 1 DO
BEGIN
GETCHCNST(.SYM); ! GET CONST TO OUTPUT
OUTCHDATA(.CHDBP,.CHDLEN,.DCON1,.SYM);
! WRITE CONST TO .REL FILE
%2216% CHDBP = BPADD(.CHDBP,.CHDLEN);
! BUMP TO NEXT ELEMENT OF ARRAY
END
END ! [1242] CHARACTER
END ! SLIST
%(***IF THIS DATA-ITEM IS A DATACALL(EITHER AN ARRAYREF OR A SCALAR)***)%
ELSE
BEGIN ! DATACALL
%(***GET PTR TO SYMBOL TABLE ENTRY CORRESP TO THE DATA ITEM***)%
SYM_.DATAITMPTR[DCALLELEM];
%(***IF THE DATA-ITEM IS AN ARRAYREF, MUST GET PTR TO ENTRY FOR THE
ARRAY-NAME***)%
%1416% IF .SYM[OPRCLS] EQL SUBSTRING
%1416% THEN SYM_.SYM[ARG4PTR];
IF .SYM[OPRCLS] EQL ARRAYREF
THEN SYM_.SYM[ARG1PTR];
IF .SYM[VALTYPE] NEQ CHARACTER
THEN
BEGIN ! NON-CHARACTER
GETDCNST(.SYM); !SET UP DCON1 AND DCON2 TO THE 2 WDS OF THE
! CONSTANT TO BE OUTPUT (DO NOT USE DCON2 IF
! SYMBOL IS INTEGER OR REAL)
DADDR_GETDADDR(); !ADDRESS INTO WHICH TO STORE
! Output constant in DCON1 and DCON2
%2457% OUTDATA(.DADDR,.SYM);
END ! NON-CHARACTER
ELSE
BEGIN ! [1242] CHARACTER
GETCHCNST(.SYM); ! SET UP DCON1 TO POINT TO
! THE NEXT CHAR CONSTANT
GETCHADDR(); ! GET CHDBP, BYTE PTR TO STRING
! AND CHDLEN, LENGTH
OUTCHDATA(.CHDBP,.CHDLEN,.DCON1,.SYM);
! WRITE STRING INTO .REL BLOCK
END ! [1242] CHARACTER
END; ! DATACALL
DATAITMPTR_.DATAITMPTR[CLINK];
ADJDATPTR(); !GET PTR TO NEXT ITEM ON DATA-ITEM-LIST
! WHICH IS EITHER A DATACALL OR
! SLISTCALL, ADJUST ANY DO-LOOP INDICES
END;
IF .DATACNSTPTR NEQ 0 !IF THERE ARE STILL CONSTANTS LEFT AFTER
! ALL VARS HAVE BEEN FILLED
%1157% THEN WARNERR(PLIT'is less than?0',.ISN,E57<0,0>); !GIVE WARNING
END; ! of ALCDATA
GLOBAL ROUTINE ADJDATPTR=
%(***************************************************************************
THIS ROUTINE IS ALWAYS CALLED AFTER THE GLOBAL "DATAITMPTR" HAS
BEEN MOVED FORWARD BY SETTING IT TO THE LINK FIELD OF THE PRECEEDING
NODE POINTED TO. IF THE NODE TO WHICH IT HAS BEEN ADVANCED IS
A DATACALL NODE, NO ACTION NEED BE TAKEN. IF THE NODE TO WHICH IT
HAS BEEN ADVANCED IS A DO STATEMENT NODE, THE DO LOOP MUST
BE INTIALIZED AND DATAITMPTR ADVANCED TO THE NEXT STMNT.
IF THE NODE TO WHICH IT HAS BEEN ADVANCED IS A CONTINUE STATEMENT WHICH
TERMINATES A DO, THE DO INDEX MUST BE ADVANCED, A LOOP-TERMINATION TEST
MADE, AND DATAITMPTR EITHER SET BACK TO THE FIRST STMNT INSIDE THE DO,OR
ADVANCED TO THE STMNT AFTER THE CONTINUE.
(NOTE THAT NO MORE THAN ONE DO LOOP WILL EVER BE TERMINATED ON THE
SAME CONTINUE; NOTE ALSO THAT DO INDICES MUST BE INTEGER AND THAT
INITL, FINAL, AND INCR VALS ON DO LOOPS MUST BE INTEGER CONSTANTS.
***************************************************************************)%
BEGIN
OWN PEXPRNODE DOINDEX; !SYMBOL TABLE ENTRY FOR THE VAR USED AS
! THE INDEX ON A DO STMNT BEING PROCESSED
LOCAL PEXPRNODE INCRVAL:FINALVAL; !INCREMENT AND FINAL LIMIT OF DO LOOP
%(***WALK THRU THE DATA ITEM LIST UNTIL EITHER REACH THE END OF THE
LIST, OR REACH AN ELEMENT WHICH IS A DATACALL OR SLISTCALL***)%
UNTIL .DATAITMPTR EQL 0
DO
BEGIN
%(***IF ARE LOOKING AT A DATACALL OR AN SLIST, RETURN*****)%
IF .DATAITMPTR[OPRCLS] NEQ STATEMENT THEN RETURN;
%(***IF ARE LOOKING AT A DO STATEMENT, SET THE "IDDATVAL" FIELD IN
THE SYMBOL TABLE ENTRY FOR THE DO INDEX TO ITS INITIAL VALUE***)%
IF .DATAITMPTR[SRCID] EQL DOID
THEN
BEGIN
OWN PEXPRNODE DOINITVAL;
DOINDEX_.DATAITMPTR[DOSYM];
DOINITVAL_.DATAITMPTR[DOM1];
%(***CAN ASSUME INITIAL VAL IS AN INTEG CONSTANT***)%
DOINDEX[IDDATVAL]_.DOINITVAL[CONST2];
%1416% %(***CHECK FOR ZERO-TRIP LOOP***)%
%1416% IF F77 THEN
%1416% BEGIN
%1416% INCRVAL _ .DATAITMPTR[DOM3]; ! GET INCREMENT
%1416% FINALVAL _ .DATAITMPTR[DOM2]; ! GET FINAL VAL
%1416%
%1416% ! Check for initial value already greater than
%1416% ! final value (ie, for zero-trip loop)
%1416% IF (.INCRVAL[CONST2] GTR 0 AND
%2202% .DOINDEX[IDDATVAL] GTR .FINALVAL[CONST2])
%1416% OR (.INCRVAL[CONST2] LSS 0 AND
%2202% .DOINDEX[IDDATVAL] LSS .FINALVAL[CONST2])
%1416% OR (.INCRVAL[CONST2] EQL 0)
%1416% THEN
%1416% FATLERR(.ISN,E175<0,0>); ! "zero-trip loop illegal"
%1416% END;
%(***GO ON TO NEXT ELEM****)%
DATAITMPTR_.DATAITMPTR[CLINK];
END
ELSE
%(***IF ARE LOOKING AT A CONTINUE WHICH TERMINATES A DO STMNT, INCREMENT
THE DO INDEX AND TEST FOR THE DO INDEX GTR THAN ITS FINAL VAL.
IF HAVE FINISHED ITERATING THIS LOOP, THEN GO ON TO NEXT ELEM,
OTHERWISE GO BACK TO THE START OF THE LOOP****)%
IF .DATAITMPTR[SRCID] EQL CONTID
THEN
BEGIN
OWN PEXPRNODE LABNODE; !LABEL TABLE ENTRY FOR LABEL ON CONTINUE
OWN BASE DOSTNODE; !DO STMNT NODE AT START OF LOOP
OWN PEXPRNODE INCRVAL:FINALVAL; !CONSTANT TABLE ENTRIES
! FOR INCREMENT AND FINAL VAL
! OF LOOP INDEX
LABNODE_.DATAITMPTR[SRCLBL];
IF .LABNODE EQL 0 THEN CGERR(); !THE CONTINUE MUST TERMINATE SOME LOOP
DOSTNODE_.LABNODE[SNDOLNK];
IF .DOSTNODE EQL 0 THEN CGERR(); !THE CONTINUE MUST TERMINATE A DO
DOSTNODE_.DOSTNODE[LEFTP]; !GET PTR TO STMNT FROM THE LINKED LIST
! OF DO STMNTS ASSOCIATED WITH THIS LABEL
! (NOTE THATFOR A DATA STMNT THERE
! WILL NEVER BE MORE THAN 1)
INCRVAL_.DOSTNODE[DOM3];
FINALVAL_.DOSTNODE[DOM2];
DOINDEX_.DOSTNODE[DOSYM];
%(***INCR THE DO INDEX***)%
%2202% DOINDEX[IDDATVAL] = .DOINDEX[IDDATVAL]+.INCRVAL[CONST2]; !GET SIGNED #
![666] NEGATIVE (AND ZERO) INCREMENTS FOR DATA STATEMENT NOT HANDLED
![666] CORRECTLY - REVERSE SENSE OF THE TEST IF NEGATIVE INCREMENT
%[666]% IF ( .INCRVAL[CONST2] GTR 0 AND
%2202% .DOINDEX[IDDATVAL] GTR .FINALVAL[CONST2])
%[666]% OR ( .INCRVAL[CONST2] LSS 0 AND
%2202% .DOINDEX[IDDATVAL] LSS .FINALVAL[CONST2])
%[666]% OR ( .INCRVAL[CONST2] EQL 0)
THEN
%(***IF HAVE FINISHED LOOP ITERATION, GO ON TO STMNT AFTER LOOP***)%
DATAITMPTR_.DATAITMPTR[CLINK]
ELSE
%(***IF HAVE NOT FINISHED LOOP ITERATION, GO BACK TO STMNT AFTER DO STMNT***)%
DATAITMPTR_.DOSTNODE[CLINK];
END
ELSE CGERR(); !STMNT MUST BE EITHER DO OR CONTINUE
END;
END; ! of ADJDATPTR
GLOBAL ROUTINE GETDADDR=
%(***************************************************************************
THIS ROUTINE RETURNS THE RELOCATABLE ADDRESS CORRESPONDING TO
A DATACALL ELEMENT IN A DATA ITEM LIST.
IT IS CALLED WITH THE GLOBAL "DATAITMPTR" POINTING TO THE
DATACALL NODE FOR WHICH AN ADDRESS IS TO BE COMPUTED.
***************************************************************************)%
BEGIN
REGISTER PEXPRNODE DATAELEM; !EXPRESSION NODE UNDER THE DATACALL - MAY BE
! AN ARRAYREF OR A DATA ITEM
REGISTER PEXPRNODE ARRAYNMENTRY; !SYMBOL TABLE ENTRY FOR THE ARRAY NAME
REGISTER PEXPRNODE ARRAYSIZE; ! THE NUMBER OF WDS IN THE ARRAY
OWN OFFST; !OFFSET IN THE ARRAY OF THE WD TO BE INITIALIZED
DATAELEM_.DATAITMPTR[DCALLELEM];
IF .DATAELEM[OPRCLS] EQL DATAOPR THEN RETURN .DATAELEM[IDADDR]
ELSE
IF .DATAELEM[OPRCLS] EQL ARRAYREF
THEN
BEGIN
ARRAYNMENTRY_.DATAELEM[ARG1PTR];
ARRAYSIZE_.ARRAYNMENTRY[IDDIM]; !DIM TABLE ENTRY FOR THE ARRAY
ARRAYSIZE_.ARRAYSIZE[ARASIZ]; ! THE NUMBER
! OF WORDS IN THE ARRAY
%(***IF THE SS WAS ALREADY FOLDED INTO THE ARRAY ADDR***)%
IF .DATAELEM[ARG2PTR] EQL 0
THEN OFFST _ EXTSIGN(.DATAELEM[TARGADDR])
ELSE OFFST _ CNSTEVAL(.DATAELEM[ARG2PTR]) + EXTSIGN(.DATAELEM[TARGADDR]) ;
%(**IF ARE TRYING TO SET A VALUE AFTER THE END OF THE ARRAY**)%
IF .OFFST GTR (.ARRAYSIZE-1)
%1131% OR .OFFST LSS 0 ! or before the beginning . . .
THEN FATLERR(.ARRAYNMENTRY[IDSYMBOL],.ISN,E135);
RETURN .OFFST+.ARRAYNMENTRY[IDADDR];
END
ELSE CGERR();
END; ! of GETDADDR
ROUTINE GETCHADDR= ! [1242] New
! This routine returns a byte pointer and character count for the character
! variable or character array ref or character substring ref in a data item
! list. Same as GETDADDR, but GETDADDR is called for numeric variables,
! GETCHADDR is called for character variables.
!
! Globals: same as GETDADDR
! DATAITMPTR = datacall node for which address is to be computed
! Return: CHDBP = byte pointer to char string to be initialized
! CHDLEN = number of chars in the variable
BEGIN
REGISTER PEXPRNODE DATAELEM; ! EXPRESSION NODE UNDER THE DATACALL,
! MAY BE ARRAYREF, DATA ITEM, SUBSTRING
REGISTER PEXPRNODE ARRAYNMENTRY; ! SYMBOL TABLE ENTRY FOR ARRAY NAME
REGISTER PEXPRNODE ARRAYSIZE; ! NUMBER OF CHARS IN THE ARRAY
OWN OFFST; ! CHAR OFFSET WITHIN ARRAY
DATAELEM _ .DATAITMPTR[DCALLELEM];
OFFST _ 0; ! INIT OFFSET TO 0
CHDLEN _ -1; ! LENGTH NOT SET YET
IF .DATAELEM[OPRCLS] EQL SUBSTRING
THEN
BEGIN ! SUBSTRING
OFFST _ CNSTEVAL(.DATAELEM[ARG2PTR]); ! GET LOWER BOUND - 1
CHDLEN _ CNSTEVAL(.DATAELEM[ARG1PTR]); ! GET UPPER BOUND
ARRAYNMENTRY _ .DATAELEM[ARG4PTR];
IF .ARRAYNMENTRY[OPRCLS] EQL ARRAYREF
THEN ARRAYNMENTRY _ .ARRAYNMENTRY[ARG1PTR];
ARRAYSIZE _ .ARRAYNMENTRY[IDCHLEN];
IF .OFFST LSS 0 OR .OFFST GEQ .ARRAYSIZE !CHECK LOWER BOUND
OR .CHDLEN LEQ 0 OR .CHDLEN GTR .ARRAYSIZE !CHECK UPPER BOUND
OR .OFFST GEQ .CHDLEN !CHECK LOWER VS. UPPER
THEN FATLERR(.ISN,E173<0,0>); !GIVE WARNING IF PROBLEM
CHDLEN _ .CHDLEN - .OFFST; ! SET LENGTH
DATAELEM _ .DATAELEM[ARG4PTR]; ! MOVE DOWN TO SUBSTRINGEE NODE
END; ! SUBSTRING
IF .DATAELEM[OPRCLS] EQL DATAOPR
THEN
BEGIN ! SIMPLE VARIABLE
%2216% CHDBP _ BPADD(.DATAELEM[IDCHBP],.OFFST); ! SET BYTE PTR
IF .CHDLEN LSS 0 THEN CHDLEN _ .DATAELEM[IDCHLEN];
! IF LEN NOT SET BY SUBSTRING ABOVE,
! SET TO WHOLE STRING
END ! SIMPLE VARIABLE
ELSE
IF .DATAELEM[OPRCLS] EQL ARRAYREF
THEN
BEGIN ! ARRAYREF
ARRAYNMENTRY _ .DATAELEM[ARG1PTR]; ! GET ARRAY ID TABLE ENTRY
ARRAYSIZE _ .ARRAYNMENTRY[IDDIM]; ! DIM TABLE ENTRY
ARRAYSIZE _ .ARRAYSIZE[ARASIZ]; ! NUMBER OF CHARS IN ARRAY
IF .DATAELEM[ARG2PTR] NEQ 0 ! ADD SUBSCRIPT INTO OFFSET
THEN OFFST _ .OFFST + CNSTEVAL(.DATAELEM[ARG2PTR]);
IF .OFFST GTR .ARRAYSIZE-1 OR .OFFST LSS 0 ! CHECK SUBSCRIPT
THEN FATLERR(.ARRAYNMENTRY[IDSYMBOL],.ISN,E135<0,0>);
%2216% CHDBP _ BPADD(.ARRAYNMENTRY[IDCHBP],.OFFST); ! SET BYTE PTR
IF .CHDLEN LSS 0 THEN CHDLEN _ .ARRAYNMENTRY[IDCHLEN];
! IF LEN NOT SET BY SUBSTRING ABOVE,
! SET TO WHOLE STRING
END !ARRAYREF
ELSE CGERR(); ! ERROR IF NOT DATAOPR OR ARRAYREF
END; ! of GETCHADDR
GLOBAL ROUTINE CNSTEVAL(EXPR)=
%(***************************************************************************
TO FOLD AN ARITHMETIC EXPRESSION IN WHICH ALL TERMS ARE INTEGER
CONSTANTS.
THE ARGUMENT "EXPR" MUST BE EITHER AN ARITHMETIC NODE OR AN INTEGER
CONSTANT NODE OR A SYMBOL TABLE ENTRY FOR AN INDEX ON AN INPLICIT
DO-LOOP INSIDE A DATA STATEMENT.
RETURNS THE VALUE COMPUTED.
THIS ROUTINE IS RECURSIVE
***************************************************************************)%
BEGIN
MAP PEXPRNODE EXPR;
IF .EXPR[OPR1] EQL CONSTFL THEN RETURN .EXPR[CONST2]
ELSE
%(***IF EXPR IS A SYMBOL TABLE ENTRY, ASSUME THAT IT
IS AN INDEX ON AN IMPLIED DO IN A DATA STMNT AND
THAT THE "IDDATVAL" FIELD OF THE SYMBOL TABLE ENTRY CONTAINS
THE CURRENT VAL OF THAT INDEX***********)%
IF .EXPR[OPRCLS] EQL DATAOPR
%2202% THEN RETURN .EXPR[IDDATVAL]
ELSE
IF .EXPR[OPRCLS] EQL ARITHMETIC
THEN
BEGIN
CASE .EXPR[OPERSP] OF SET
%(***FOR ADD*****)%
RETURN CNSTEVAL(.EXPR[ARG1PTR]) + CNSTEVAL(.EXPR[ARG2PTR]);
%(***FOR SUBTRACT***)%
RETURN CNSTEVAL(.EXPR[ARG1PTR]) - CNSTEVAL(.EXPR[ARG2PTR]);
%(***FOR MULTIPLY***)%
RETURN CNSTEVAL(.EXPR[ARG1PTR])*CNSTEVAL(.EXPR[ARG2PTR]);
%(***FOR DIVIDE***)%
RETURN (CNSTEVAL(.EXPR[ARG1PTR]))/(CNSTEVAL(.EXPR[ARG2PTR]));
%(***FOR EXPONENTIATION***)%
%1416% RETURN IPOWER(CNSTEVAL(.EXPR[ARG1PTR]),CNSTEVAL(.EXPR[ARG2PTR]))
TES;
END
ELSE
%(***FOR NEG (APPEARS ABOVE NEGATIVE CONSTANTS)***)%
IF .EXPR[OPR1] EQL NEGFL
THEN RETURN -CNSTEVAL(.EXPR[ARG2PTR])
ELSE CGERR();
END; ! of CNSTEVAL
GLOBAL ROUTINE IPOWER(BASE,EXP)= ! [1416] New
%(***************************************************************************
ROUTINE TO EVALUATE INTEGER ** INTEGER
***************************************************************************)%
BEGIN
REGISTER ANS,BASESQ,N;
N = .EXP;
IF .N LSS 0
THEN
BEGIN
IF .BASE NEQ 1 AND .BASE NEQ -1
THEN RETURN 0
ELSE IF .N THEN RETURN .BASE ELSE RETURN 1;
END;
IF .N EQL 0 THEN RETURN 1;
ANS = 1;
BASESQ = .BASE;
WHILE 1 DO
BEGIN ! HERE BASE**EXP = ANS * BASESQ**N
IF .N ! IF EXPONENT IS ODD
THEN
BEGIN
ANS = .ANS * .BASESQ; ! MULTIPLY
IF .N LEQ 1 THEN RETURN .ANS;
END;
N = .N ^ (-1); ! ADJUST EXPONENT
BASESQ = .BASESQ * .BASESQ; ! ADJUST BASE
END;
END; ! of IPOWER
GLOBAL ROUTINE GETDCNST(SYM)=
%(***************************************************************************
ROUTINE TO SET UP THE NEXT CONSTANT WORD(S) TO BE OUTPUT FOR A GIVEN
DATA-CONSTANT-LIST.
CALLED WITH THE GLOBALS:
DATACNSTPTR-PTR TO THE ENTRY ON THE DATA CONSTANT LIST TO BE USED NEXT
CNSTCT- COUNT OF THE NUMBER OF TIMES THAT THE CONSTANT
INDICATED BY "DATACNSTPTR" HAS BEEN OUTPUT (NOTE THAT FOR
MULTI-WORD CONSTANTS, THIS COUNT IS ONLY INCREMENTED AFTER ALL
WORDS OF THE CONSTANT HAVE BEEN OUTPUT)
CNSTWDCT-COUNT OF THE NUMBER OF WORDS OF THE INDICATED CONSTANT THAT HAVE
ALREADY BEEN OUTPUT (NOTE THAT THIS CT IS SET BECK TO 0 FOR EACH
REPITITION OF A GIVEN CONSTANT)
CALLED WITH THE ARG
SYM - THE SYMBOL THAT WILL BE SET TO THIS CONSTANT;
UNLESS THE CONSTANT IS A LITERAL, IT MUST BE CONVERTED TO AGREE IN TYPE
WITH "SYM"
IF SYM IS DOUBLE-PREC OR COMPLEX THIS ROUTINE LEAVES THE GLOBALS-
DCON1 - HIGH ORDER WD OF THE CONSTANT TO BE OUTPUT
DCON2 - LOW ORDER WD TO BE OUTPUT
OTHERWISE IT LEAVES
DCON1- THE WORD TO BE OUTPUT
DCON2 - IS IGNORED
***************************************************************************)%
BEGIN
OWN BASE CNSTENTRY; !CONSTANT TABLE ENTRY FOR THE DESIRED CONSTANT
MAP PEXPRNODE SYM;
%(***IF HAVE REACHED THE END OF THE LIST OF CONSTANTS (AND PRESUMABLY NOT THE
END OF THE LIST OF DATA ITEMS) GIVE A WARNING MESSAGE
AND FILL WITH ZEROES***)%
IF .DATACNSTPTR EQL 0
THEN
BEGIN
IF NOT .XTRAVARS !IF THIS IS THE 1ST VAR TO BE FILLED WITH 0'S
THEN
%1157% WARNERR(PLIT'is greater than?0',.ISN,E57<0,0>); !PRINT WARNING MESSAGE
XTRAVARS_TRUE;
DCON1_0;
DCON2_0;
RETURN
END;
CNSTENTRY_.DATACNSTPTR[DCONST];
%(***FOR HOLLERITH********)%
!**;[1212], GETDCNST, TFV, 29-Apr-81
!**;[1212], Replace LITERAL with HOLLERITH, LITERALENTRY with HOLLENTRY
%[1212]% IF .CNSTENTRY[VALTYPE] EQL HOLLERITH
%[1236]% OR .CNSTENTRY[VALTYPE] EQL CHARACTER ! Allow quoted constants as well as H
THEN
BEGIN
%[1212]% OWN HOLLENTRY LITENTRY;
OWN LITSIZ1; !NUMBER OF WDS IN THE LITERAL EXCLUDING A
! POSSIBLE PAD WD (DO NOT PUT ASCIZ OU FOR DATA STMNT)
LITSIZ1_(IF .CNSTENTRY[LITEXWDFLG] THEN .CNSTENTRY[LITSIZ]-1
ELSE .CNSTENTRY[LITSIZ] );
LITENTRY_.CNSTENTRY;
%(***VAL TO BE OUTPUT IS THE (N+1)TH WD OF THE LITERAL, WHERE N IS THE
VALUE OF CNSTWDCT (IE NUMBER OF WDS OF THE LITERAL ALREADY OUTPUT***)%
DCON1_.LITENTRY[.CNSTWDCT+1];
%(***GO ON TO NEXT WD OF LITERAL***)%
CNSTWDCT_.CNSTWDCT+1;
%(***IF THE SYMBOL BEING INITIALIZED IS DOUBLE-WD, MUST PICK UP A 2ND
WD OF THE LITERAL (IF HAVE REACHED THE END OF THE LITERAL, SET 2ND
WD TO A WD OF BLANKS ***)%
IF .SYM[DBLFLG]
THEN
BEGIN
IF .CNSTWDCT EQL .LITSIZ1 !IF HAVE REACHED END OF LIT
%2423% THEN DCON2 = ' ' !A WORD OF BLANKS
ELSE
BEGIN
DCON2_.LITENTRY[.CNSTWDCT+1];
CNSTWDCT_.CNSTWDCT+1;
END;
END;
%(***IF HAVE OUTPUT THE ENTIRE LITERAL, SET THE WORD CT BACK TO 0 AND
INCREMENT THE CT OF NUMBER OF TIMES THE WHOLE CONSTANT WAS OUTPUT***)%
IF .CNSTWDCT EQL .LITSIZ1
THEN
BEGIN
CNSTWDCT_0;
CNSTCT_.CNSTCT+1;
END;
END
ELSE
%(***FOR CONSTANTS OTHER THAN LITERALS***)%
BEGIN
%(***IF THE SYMBOL IS OF A DIFFERENT VALTYPE THAN THE CONSTANT,
CONVERT THE CONSTANT***)%
IF .SYM[VALTP1] NEQ .CNSTENTRY[VALTP1]
THEN
BEGIN
C1H_.CNSTENTRY[CONST1];
C1L_.CNSTENTRY[CONST2];
COPRIX_KKTPCNVIX(.SYM[VALTP2],.CNSTENTRY[VALTP2]);
CNSTCMB(); !LEAVES THE GLOBALS C2H,C2L SET TO THE CONVERTED
! VALUE
END
ELSE
BEGIN
C2H_.CNSTENTRY[CONST1]; !SET THE GLOBALS C2H,C2L TO THE ORIG VALUE
C2L_.CNSTENTRY[CONST2];
END;
%(***SET UP DCON1 AND DCON2 TO BE THE CONSTANT***)%
CASE .SYM[VALTP1] OF SET
%(***IF THE TYPE IS INTEGER OR OCTAL/LOGICAL***)%
DCON1_.C2L;
%(***IF THE TYPE IS REAL - MUST ROUND SINCE HAVE STORED 2 WDS OF PREC***)%
%1542% DCON1=IF .GFLOAT
%1542% THEN KISNGL(.C2H,.C2L) !Even originally OCTAL constants need conversion under /GFL
ELSE IF BITPTNVALTYP(.CNSTENTRY[VALTYPE]) !IF THE CONSTANT WAS OCTAL,...
THEN .C2H ! DONT ROUND
ELSE KISNGL(.C2H,.C2L);
%(***IF THE TYPE IS DOUBLE PREC ***)%
BEGIN
DCON1_.C2H;
DCON2_.C2L;
END;
%(***IF THE TYPE IS COMPLEX***)%
BEGIN
DCON1_.C2H;
DCON2_.C2L;
END;
TES;
%(***INCR CT OF NUMBER OF TIMES THIS CONSTANT HAS BEEN USED***)%
CNSTCT_.CNSTCT+1;
END;
%(***TEST FOR WHETHER HAVE FINISHED ALL REPITITIONS OF THE CONSTANT AND IF SO
GO ON TO THE NEXT***)%
IF .CNSTCT GEQ .DATACNSTPTR[DATARPT]
THEN
BEGIN
DATACNSTPTR_.DATACNSTPTR[CLINK];
CNSTCT_0;
END;
END; ! of GETDCNST
ROUTINE GETCHCNST(SYM)= ! [1242] New
! Routine to set up the next character constant to be output for a given
! data-constant-list. Same as GETDCNST, but GETDCNST is called for numeric
! variables, GETCHCNST is called for character variables.
!
! Globals: same as GETDCNST
! DATACNSTPTR = ptr to entry on the data constant list to be
! used next
! CNSTCT = count of the number of times that the constant
! indicated by DATACNSTPTR has been output (note that
! for multi-word constants, this count is only
! incremented after all words of the constant have
! been output)
! CNSTWDCT = count of the number of words of the indicated
! constant that have already been output (note that this
! count is set back to 0 for each repetition of a given
! constant)
! Args: SYM = the symbol which will be set to this constant
! must be type CHARACTER
! The corresponding constant in the constant-list must be type character; if
! not, a fatal error message is typed. The character constant cannot have
! been partially used up by numeric variables; if not, a fatal error message
! is typed.
!
! Returns DCON1 = pointer to literal table entry of a character constant
! or 0 if the corresponding variable should be set to blanks
BEGIN ! GETCHCNST
MAP PEXPRNODE SYM;
MAP PEXPRNODE DCON1;
! If at end of the constant-list, type warning message
IF .DATACNSTPTR EQL 0
THEN
BEGIN
IF NOT .XTRAVARS ! IF THIS IS THE FIRST TIME
THEN
%1157% WARNERR(PLIT'is greater than?0',.ISN,E57<0,0>); !PRINT WARNING MESSAGE
XTRAVARS _ TRUE;
DCON1 _ 0;
DCON2 _ 0;
RETURN;
END;
DCON1 _ .DATACNSTPTR[DCONST]; ! GET PTR TO CONSTANT
DCON2 _ 0;
IF .DCON1[VALTYPE] NEQ CHARACTER ! CHECK DATATYPE
THEN
BEGIN
FATLERR(.SYM[IDSYMBOL],.ISN,E160<0,0>);
! "Can't store numeric constant
! in character variable X"
DCON1 _ 0;
END;
IF .CNSTWDCT NEQ 0 ! CHECK THAT WE ARE AT BEGINNING OF CONSTANT
THEN
BEGIN
FATLERR(.ISN,E161<0,0>); ! "Character constant split between
! numeric and character variables"
CNSTWDCT _ 0;
DCON1 _ 0;
END;
! Increment count of how many times this const has been used
CNSTCT _ .CNSTCT + 1;
! Test for whether we've finished all repetitions of this constant and
! go to the next if we have
IF .CNSTCT GEQ .DATACNSTPTR[DATARPT]
THEN
BEGIN
DATACNSTPTR _ .DATACNSTPTR[CLINK];
CNSTCT _ 0;
END;
END; ! of GETCHCNST
ROUTINE OUTDATA(SYMADDR,SYMPT)=
!++
! FUNCTIONAL DESCRIPTION:
!
! Routine to output a type 21 or 1160 REL block to initialize a
! numeric variable to support DATA statements.
!
! When using 1160 blocks, the data is never output immediately,
! but is instead saved away in case the next item follows it in
! the compiler's allocation of variables for the user's core
! image. This allows us to take advantage of the 1160's repeat
! count feature. However, if the current item can't be appended
! to the last item, the last item is output.
!
! Note that the second data word to be output (DCON2) is valid
! iff SYMPT is a double word datatype.
!
! FORMAL PARAMETERS:
!
! SYMADDR The allocated address for the data.
!
! SYMPT A pointer to the symbol being initialized.
!
! IMPLICIT INPUTS:
!
! DATDAT Pointer to buffered literal table entry, or 1 or 2
! buffered words of numeric data for 1160 support.
!
! DATNEXT Byte pointer or address this 1160 datum must match to
! qualify as a repeat of the buffer contents.
!
! DATPSECT Internal psect index or pointer to COMMON block
! for DATORG and DATNEXT.
!
! DATRPT Repeat count for buffer.
!
! DATSIZE Byte or word count for 1160 data.
!
! DCON1, DCON2 The values to store.
!
! F2<EXTENDFLAG> True iff we are generating a psected object file.
!
! FLGREG<OBJECT> True iff we are generating an object file.
!
! MAINRLBF May contain a type 21 block to be appended to.
!
! IMPLICIT OUTPUTS:
!
! DATDAT 1 or 2 buffered words of numeric data for 1160 support.
!
! DATFILL Number of fill bytes for 1160 block (0).
!
! DATNEXT Object address to match against next datum.
!
! DATORG Object address for buffered datum.
!
! DATPSECT Internal psect index or COMMON block pointer for
! buffered data.
!
! DATRPT Updated repeat count for buffer.
!
! DATSIZE Length of buffered constant in words.
!
! MAINRLBF May have type 21 words appended, could be flushed.
!
! R2 Sometimes smashed by Radix-50 conversion
! of COMMON names.
!
! RDATWD Type 21 words are output through this.
!
! ROUTINE VALUE:
!
! None
!
! SIDE EFFECTS:
!
! Can result in type 21 or 1160 blocks being output to the
! object and listing files.
!
!--
![2423] Moved from OUTMOD and doubled routine size to add 1160 support
BEGIN
MAP
BASE R2:SYMPT;
REGISTER
%2423% BASE MYPSECT, ! My psect index or COMMON
%2423% NUMWORDS; ! Number of words of data
LABEL
%2453% FLUSHING;
IF NOT .FLGREG<OBJECT> ! Producing REL file ?
THEN RETURN; ! No, punt
%2423% IF .SYMPT[DBLFLG] ! DP or COMPLEX variable?
%2423% THEN NUMWORDS = 2 ! Yes, remember that
%2423% ELSE ! Nope, must be single
%2423% BEGIN ! NOT DOUBLE
%2423% NUMWORDS = 1; ! Say one word
%2457% DATDAT[1] = .DCON2; ! Make second comparison always
%2423% ! win to make it simpler
%2423% END; ! NOT DOUBLE
%1544% IF EXTENDED ! Psected object code ?
%2423% THEN ! Yes, use 1160 blocks
%2423% BEGIN ! EXTENDED
%2423% IF .SYMPT[IDATTRIBUT(INCOM)] ! In COMMON?
%2423% THEN MYPSECT = .SYMPT[IDCOMMON] ! Yes, get COMMON block pointer
%2423% ELSE MYPSECT = .SYMPT[IDPSECT]; ! No, use psect index
! The lack of a short-circuit OR ELSE operator in
! Bliss-10 makes it necessary to construct one with a
! sequence of IF/THENs and a LEAVE in order to attain
! stylish levels of performance.
! *** The following compound expression has one LEAVE
! *** which *may* cause control to leave it early
FLUSHING: BEGIN ! FLUSHING, NY
%2457% IF .DCON1 EQL .DATDAT[0] ! Is the data the same
%2457% THEN IF .DCON2 EQL .DATDAT[1] ! or is it a string
%2453% THEN IF .SYMADDR EQL .DATNEXT ! or the wrong address
%2453% THEN IF .MYPSECT EQL .DATPSECT ! or the wrong psect
%2453% THEN IF .NUMWORDS EQL .DATSIZE ! or the wrong size?
%2453% THEN LEAVE FLUSHING; ! No, GOTO Massapequa
! If we did NOT manage to pass through the
! above gauntlet of IFs, then new data we were
! handed is different from what is in the
! buffer. Flush the buffer and start anew.
%2423% FLUSHDATA(); ! Output the old datum
%2457% DATDAT[0] = .DCON1; ! Remember the new constant
%2457% DATDAT[1] = .DCON2; ! (both words of it),
%2423% DATORG = DATNEXT = .SYMADDR; ! and where it will go
%2423% DATPSECT = .MYPSECT; ! Save the relocation
%2423% DATSIZE = .NUMWORDS; ! Save variable size
%2423% DATFILL = 0; ! No filler for numerics
%2423% END; ! FLUSHING, NY
! *** Control *may* reach here from a LEAVE of the
! *** above compound expression.
! Suburbia begins here.
! At this point, regardless of whether the buffer has
! just been flushed or not, we will dink the repeat
! count and expected address of the next constant.
%2423% DATNEXT = .DATNEXT+.NUMWORDS; ! Where the next one will start
%2423% DATRPT = .DATRPT+1; ! One more init for LINK
%1544% END ! EXTENDED
%2423% ELSE ! Not psected, use 21 blocks
%2423% BEGIN ! NOT EXTENDED
IF .SYMPT[IDATTRIBUT(INCOM)] ! Variable in COMMON?
THEN ! Yes, do special fixup
BEGIN ! INCOM
IF .MAINRLBF[RDATCNT] GTR RBLKSIZ-4-.NUMWORDS
THEN DMPMAINRLBF(); ! Insure room for short count,
! relocation bits, symbol,
! subheader and data word(s)
R2 = .SYMPT[IDCOMMON]; ! Pointer to COMMON block node
R2 = .R2[COMNAME]; ! Fetch the block name
RDATWD = RGLOBREQ+RADIX50(); ! Convert to a symbol
ZOUTBLOCK(RDATBLK,RELN); ! request and output
%2423% RDATWD = .NUMWORDS^18+.SYMADDR<RIGHT>;! Some word(s) at
! /COMMON/+SYMADDR
ZOUTBLOCK(RDATBLK,RELN) ! Output count and offset
END ! INCOM
ELSE ! Not in COMMON
BEGIN ! NOT INCOM
IF .MAINRLBF[RDATCNT] GTR RBLKSIZ-3-.NUMWORDS
THEN DMPMAINRLBF(); ! Insure room for short count,
! relocation bits, subheader
! and data word(s)
%2423% RDATWD = .NUMWORDS^18+.SYMADDR<RIGHT>;! Some word(s)
! at SYMADDR
ZOUTBLOCK(RDATBLK,RELRI); ! Output count and addr
END; ! NOT INCOM
%2457% RDATWD = .DCON1; ! First value to be stored
ZOUTBLOCK(RDATBLK,RELN); ! Output it
%2423% IF .NUMWORDS EQL 2 ! More to come?
%2423% THEN ! Yes, go for it
%2423% BEGIN ! 2 WORDS
%2457% RDATWD = .DCON2; ! Second value to be stored
%2423% ZOUTBLOCK(RDATBLK,RELN); ! Output it
%2423% END; ! 2 WORDS
%2423% END; ! NOT EXTENDED
END; ! of OUTDATA
ROUTINE OUTCHDATA(BP,LEN,CONST,SYM) =
!++
! FUNCTIONAL DESCRIPTION:
!
! Routine to output a type 1004 or 1160 REL block to initialize
! a character string. The constant is truncated or padded to
! the right length, if necessary, and put into the REL file.
!
! When using 1160 blocks, the data is never output immediately,
! but is instead saved away in case the next item follows it in
! the compiler's allocation of variables for the user's core
! image. This allows us to take advantage of the 1160's repeat
! count feature. However, if the current item can't be appended
! to the last item, the last item is output.
!
! FORMAL PARAMETERS:
!
! BP Object time byte pointer to the string to initialize.
!
! LEN Number of characters in the string to initialize.
!
! CONST Pointer to literal table entry of a character constant
! (NIL when error has occurred).
!
! SYM Pointer to symbol table entry of variable.
!
! IMPLICIT INPUTS:
!
! DATDAT Pointer to buffered literal table entry, or 1 or 2
! buffered words of numeric data for 1160 support.
!
! DATNEXT Byte pointer or address this 1160 datum must match to
! qualify as a repeat of the buffer contents.
!
! DATPSECT Internal psect index or pointer to COMMON block
! for DATORG and DATNEXT.
!
! DATRPT Repeat count for buffer.
!
! DATSIZE Byte or word count for 1160 data.
!
! F2<EXTENDFLAG> True iff we are generating a psected object file.
!
! FLGREG<OBJECT> True iff we are generating an object file.
!
! IMPLICIT OUTPUTS:
!
! DATDAT Address of literal table entry being buffered.
!
! DATFILL Number of fill bytes for 1160 block.
!
! DATNEXT Object byte pointer to match against next datum.
!
! DATORG Object byte pointer for buffered datum.
!
! DATPSECT Internal psect index or COMMON block pointer for
! buffered data.
!
! DATRPT Updated repeat count for buffer.
!
! DATSIZE Length of buffered constant in characters.
!
! R2 Sometimes smashed by Radix-50 conversion
! of COMMON names.
!
! ROUTINE VALUE:
!
! None
!
! SIDE EFFECTS:
!
! Can result in type 1004 or 1160 blocks being output to the
! object and listing files.
!
!--
![1242] New
![2423] Moved from RELBUF and doubled routine size to add 1160 support
BEGIN ! OUTCHDATA
MAP
BASE CONST:
SYM:
R2;
OWN
BLKHDR[5];
REGISTER
WDLENGTH, ! LENGTH OF STRING IN WORDS
%2423% BASE MYPSECT; ! My psect index or COMMON
LABEL
%2453% FLUSHING;
IF NOT .FLGREG<OBJECT> THEN RETURN; ! IF NO REL FILE, RETURN
! If a pointer to a CHARACTER constant was not supplied by the
! caller, punt immediately - an error occurred while GETCHCNST
! was groping around on the DATACNSTPTR list and there is no
! data to be output.
%2452% IF .CONST EQL 0 ! NIL pointer?
%2452% THEN RETURN; ! Yes, punt immediately
%1544% IF EXTENDED ! Psected object code ?
%2423% THEN ! Yes, use 1160 blocks
%2423% BEGIN ! EXTENDED
%2423% IF .SYM[IDATTRIBUT(INCOM)] ! In COMMON?
%2423% THEN MYPSECT = .SYM[IDCOMMON] ! Yes, get COMMON block pointer
%2423% ELSE MYPSECT = .SYM[IDPSCHARS]; ! No, use internal psect index
! The lack of a short-circuit OR ELSE operator in
! Bliss-10 makes it necessary to construct one with a
! sequence of IF/THENs and a LEAVE in order to attain
! stylish levels of performance.
! *** The following compound expression has one LEAVE
! *** which *may* cause control to leave it early
FLUSHING: BEGIN ! FLUSHING, NY
%2453% IF .CONST EQL .DATDAT ! Is the data numeric
%2453% ! or not the same
%2453% THEN IF .BP EQL .DATNEXT ! or a different addr
%2453% THEN IF .MYPSECT EQL .DATPSECT ! or psect
%2453% THEN IF .LEN EQL .DATSIZE+.DATFILL ! or size?
%2453% THEN LEAVE FLUSHING; ! No, GOTO Massapequa
! If we did NOT manage to pass through the
! above gauntlet of IFs, then new data we were
! handed is different from what is in the
! buffer. Flush the buffer and start anew.
%2423% FLUSHDATA(); ! Output the old datum
%2423% DATDAT = .CONST; ! Remember the new constant
%2423% DATORG = DATNEXT = .BP; ! and where it will go
%2423% DATPSECT = .MYPSECT; ! Save the relocation
%2423% IF .LEN LEQ .CONST[LITLEN] ! Variable smaller?
%2423% THEN ! Yes, no filler needed
%2423% BEGIN ! NO FILL
%2423% DATSIZE = .LEN; ! Save variable size
%2423% DATFILL = 0; ! Pure beef - no filler
%2423% END ! NO FILL
%2423% ELSE ! Variable bigger than literal
%2423% BEGIN ! FILL
%2423% DATSIZE = .CONST[LITLEN]; ! Use whole string
%2423% DATFILL = .LEN-.CONST[LITLEN]; ! Fill the rest
%2423% END; ! FILL
%2423% END; ! FLUSHING, NY
! *** Control *may* reach here from a LEAVE of the
! *** above compound expression.
! Suburbia begins here.
! At this point, regardless of whether the buffer has
! just been flushed or not, we will dink the repeat
! count and expected byte pointer of the next constant.
%2423% DATNEXT = BPADD(.DATNEXT,.LEN); ! Where next one starts
%2423% DATRPT = .DATRPT+1; ! One more init for LINK
%1544% END ! EXTENDED
ELSE ! Not extended, use 1004 blocks
BEGIN ! NOT EXTENDED
WDLENGTH _ (.LEN+4)/5; ! GET NUMBER OF WORDS OCCUPIED
! BY INITIALIZATION STRING
IF .SYM[IDATTRIBUT(INCOM)]
THEN
BEGIN ! IN COMMON
BLKHDR[0]<LEFT> _ RCHDATA; ! BLOCK TYPE 1004
BLKHDR[0]<RIGHT> _ .WDLENGTH + 4; ! LONG COUNT
BLKHDR[1] _ 0; ! RELOCATION WORD: NONE
R2 _ .SYM[IDCOMMON]; ! COMMON BLOCK NODE
BLKHDR[2] _ .R2[COMNAME];! SIXBIT COMMON BLOCK NAME
BLKHDR[3] _ .LEN; ! BYTE COUNT
BLKHDR[4] _ .BP; ! BYTE POINTER
DMPRLBLOCK(BLKHDR,5); ! DUMP BLOCK HEADER
END ! IN COMMON
ELSE
BEGIN ! NOT IN COMMON
BLKHDR[0]<LEFT> _ RCHDATA; ! BLOCK TYPE 1004
BLKHDR[0]<RIGHT> _ .WDLENGTH + 3; ! LONG COUNT
BLKHDR[1] _ RELRI ^ 32; ! RELOCATION WORD: RIGHT HALF
! RELOC OF BYTE POINTER WORD
BLKHDR[2] _ .LEN; ! BYTE COUNT
BLKHDR[3] _ .BP; ! BYTE POINTER
DMPRLBLOCK(BLKHDR,4); ! DUMP BLOCK HEADER
END; ! NOT IN COMMON
! Output the constant from the literal node. If the
! string to be initialized is exactly the same length
! as the constant, fine. If the string is shorter,
! only output enough words of the constant to fill the
! desired length of the string. There may be unused
! characters in the last word. If the string is
! longer, output the entire constant (which is padded
! with blanks in the last word), then output blanks
! until enough words have gone out.
R1 _ .CONST[LITSIZ]-1;
IF .R1 GTR .WDLENGTH THEN R1 _ .WDLENGTH;
DMPRLBLOCK (CONST[LIT1], .R1);
INCR I FROM .CONST[LITSIZ] TO .WDLENGTH DO
DMPRLBLOCK (UPLIT' ', 1);
END; ! NOT EXTENDED
END; ! of OUTCHDATA
ROUTINE FLUSHDATA =
!++
! FUNCTIONAL DESCRIPTION:
!
! Uses information in a variety of module OWNs to construct and
! output an 1160 Ultimate Sparse Data REL block. This tells
! LINK which locations to statically initialize for Fortran DATA
! statements under extended addressing.
!
! Only expects to be called when generating a REL file under
! extended addressing.
!
! FORMAL PARAMETERS:
!
! None
!
! IMPLICIT INPUTS:
!
! DATPSECT Internal psect index or pointer to COMMON block
! for DATORG and DATNEXT.
!
! DATDAT[2] If DATNEXT is a byte pointer, address of literal table
! entry to output, otherwise 1 or 2 words of numeric
! data to be output.
!
! DATFILL Number of bytes of fill for 1160 block.
!
! DATORG Origin byte pointer for start of buffered data.
!
! DATRPT Repeat count for 1160 block.
!
! DATSIZE Number of bytes of data in buffer to output.
!
! IMPLICIT OUTPUTS:
!
! DATRPT Repeat count is zeroed.
!
! ROUTINE VALUE:
!
! None
!
! SIDE EFFECTS:
!
! May flush the 1160 REL buffer into the object and listing files.
!
!--
![2423] New
! Type 1160 Ultimate Sparse Data REL Block
! !=========================================================================!
! ! 1160 ! Long count !
! !-------------------------------------------------------------------------!
! !R!F!B! Byte pos !0! Symbol Length ! Psect Index !
! !-------------------------------------------------------------------------!
! ! Symbol in SIXBIT !
! !-------------------------------------------------------------------------!
! ! Byte size ! Origin address !
! !-------------------------------------------------------------------------!
! ! Repetition count (if R=1) !
! !-------------------------------------------------------------------------!
! ! Fill count (if F=1) !
! !-------------------------------------------------------------------------!
! ! Fill byte (if F=1) !
! !-------------------------------------------------------------------------!
! ! Byte count (if B=1) !
! !-------------------------------------------------------------------------!
! \ \
! \ Data bytes \
! \ \
! !=========================================================================!
BEGIN
MAP
BASE DATDAT; ! We are more interested in the
! fact that DATDAT[0] can be a
! pointer to a constant table
! entry than the fact that it
! is also a two word vector
REGISTER
%2423% WORDCOUNT, ! Number of data words
%2423% LONGCOUNT; ! Cursor into BLKHDR (long
! count under construction)
LOCAL
RELBUFF BLKHDR[8]; ! Holds header of 1160 block
! The following UPLIT maps the P&S field of a OWGBP into the P and S
! fields of a OWLBP. Table entries contain an entire local byte
! pointer, with G, I, X and Y fields that contain 0. The table should
! be indexed by the OWGBP's P&S field.
BIND ![2216] <LH> of OWLBPs indexed by OWG<30,6> (#61:#66)
%2216% VECTOR BPLH = UPLIT(0<36,7>,0<29,7>,0<22,7>,0<15,7>,0<8,7>,0<1,7>)-#61;
IF .DATRPT EQL 0 ! Any data in buffer?
THEN RETURN; ! No, punt quickly
BLKHDR[RTYPE] = RULTIMATEDATA; ! Set block type
LONGCOUNT = 1; ! Init long count for flag word
%2453% BLKHDR[RULTFLAGS] = 0; ! Init whole flag word to 0
IF .DATPSECT GEQ &JBDA<0,0> ! Address or psect index?
THEN ! Address, must be COMMON block
BEGIN ! COMMON
BLKHDR[RULTSYMLEN] = 1; ! One word for the symbol
BLKHDR[RULTPSECT] = PXABS; ! Don't relocate origin address
! Get the COMMON block name in SIXBIT and account for
! the extra word in the long count
BLKHDR[RULTSYMNAM] = .DATPSECT[COMNAME];
LONGCOUNT = .LONGCOUNT+1;
END ! COMMON
%2453% ELSE BLKHDR[RULTPSECT] = .EXTERNPSECT[.DATPSECT]; ! Psect index
! Output the byte size, and the origin address
BLKHDR[RULTORGADDR(LONGCOUNT = .LONGCOUNT+1)] = .DATORG<OWGBPADDR>;
IF .DATORG<OWGBPP&S> NEQ 0 ! Is DATORG a byte pointer?
THEN ! Yes, set CHARACTER P and S
BEGIN ! CHARACTER
! Get P field from the OWGBP in DATORG
BLKHDR[RULTPOS] = .BPLH[.DATORG<OWGBPP&S>]<OWLBPP>;
! Set byte size
BLKHDR[RULTSIZE(.LONGCOUNT)] = BITSPERCHAR;
WORDCOUNT = CHWORDLEN(.DATSIZE);
END ! CHARACTER
ELSE ! Nope, must be a word address
BEGIN ! NUMERIC
BLKHDR[RULTPOS] = BITSPERWORD; ! Right justified ILDB P field
BLKHDR[RULTSIZE(.LONGCOUNT)] = BITSPERWORD; ! Set word size
WORDCOUNT = .DATSIZE; ! # Bytes equals # words
END; ! NUMERIC
IF .DATRPT GTR 1 ! Non-trivial repeat count?
THEN ! Yes, output it
BEGIN ! REPEAT
BLKHDR[RULTRPTFLAG] = 1; ! Flag for repeat field
BLKHDR[RULTREPEATCOUNT(LONGCOUNT = .LONGCOUNT+1)] = .DATRPT;
END; ! REPEAT
IF .DATFILL GTR 0 ! Are fill bytes needed?
THEN ! Yes, output count and byte
BEGIN ! FILL
BLKHDR[RULTFILLFLAG] = 1; ! Flag for fill fields
! Supply fill byte count and fill byte (always a space)
BLKHDR[RULTFILLCOUNT(LONGCOUNT = .LONGCOUNT+1)] = .DATFILL;
BLKHDR[RULTFILLBYTE(LONGCOUNT = .LONGCOUNT+1)] = " ";
END; ! FILL
IF .DATSIZE GTR 1 ! More than one byte?
THEN ! Yes, output a byte count
BEGIN ! COUNT
BLKHDR[RULTBYTEFLAG] = 1; ! Flag for byte count word
! Supply size of data in bytes
BLKHDR[RULTBYTECOUNT(LONGCOUNT = .LONGCOUNT+1)] = .DATSIZE;
END; ! COUNT
BLKHDR[RDATCNT] = .LONGCOUNT+.WORDCOUNT; ! Set the long count
DMPRLBLOCK(BLKHDR,.LONGCOUNT+1); ! Output the block header
IF .DATORG<OWGBPP&S> NEQ 0 ! CHARACTER or numeric?
THEN DMPRLBLOCK(DATDAT[LIT1],.WORDCOUNT) ! It's CHARACTER
ELSE DMPRLBLOCK(DATDAT,.WORDCOUNT); ! Nope, it's numeric
DATRPT = 0; ! Empty the buffer, nothing
! to repeat yet
END; ! of FLUSHDATA
END
ELUDOM